Transition metal complexes of thiosemicarbazide and thiosemicarbazones

Thiosemicarbazone copper complexes as competent catalysts for olefin cyclopropanations

“…There is no general agreement in the literature data in the identification of n s(CS) , that for some authors is at lower frequencies (see for example Ref. [30]); however, reported data in the experimental section are in accordance with those reported by Campbell in his review [43]. This band is particularly diagnostic for transition metal complexes of thiosemicarbazide and thiosemicarbazones, since upon coordination could be shifted almost 100 cm À1 to lower frequencies.…”

Copper(II) complexes derived from di-2-pyridyl ketone-N4-phenyl-3-semicarbazone: Synthesis and spectral studies

“…Strong bands in the 23,830-23,910 cm −1 range observed in the spectra of all Cu(II) complexes are assigned to O → Cu and N → Cu LMCT transitions. In the chloro complex 1, a shoulder observed at 23,300 cm −1 is assigned as Cl → Cu charge-transfer transition [32]. All the complexes gave d-d bands in the 14,950-16,000 cm −1 range [33,34].…”

Re‐examination of the adsorption and reduction processes of thiosemicarbazide at a silver electrode: SERS, UV–visible and capillary electrophoresis studies

“…1(A)]. This shift has the same magnitude as the difference between the (CS) values in free TSC and TSC-Ag complex, 21 indicating an interaction of the sulfur atom with the metallic surface. The SERS spectrum at 1.4 V resembles, to a great extent, the 400 600 800 1000 1200 1400 1600 Raman spectrum of solid TSC [ Fig.…”

“…19,20 When TSC acts as a monodentate ligand through the S atom, it assumes a trans conformation as in silver complexes, 21 whereas when TSC acts as a bidentate ligand through the S and N atoms, it assumes a cis conformation, as in nickel and mercury complexes. 21 -23 A number of experimental and theoretical vibrational studies of TSC and H C TSC have been published, and in all of them (CS) stretching has been assigned to the band at 800 cm 1 for TSC and at 707 cm 1 for H C TSC.…”